Ultrasonographic Diagnosis of Bilateral Spontaneous Ovarian Hemorrhage in a 7-Year-Old Female Black-and-White Ruffed Lemur (Varecia variegata).

A 7-year-old female intact, black-and-white ruffed lemur (Varecia variegata) presented for acute anorexia, lethargy, and abnormal behavior. Initial radiographs were concerning for gastrointestinal ileus. Abdominal ultrasonography identified bilateral periovarian masses and a moderate volume of echogenic peritoneal effusion; no definitive blood flow was seen within the masses on Color Doppler. Bilateral ovariectomy was performed, and histopathology confirmed bilateral ovarian hematomata and hemoabdomen due to an idiopathic arteriopathy. The patient recovered with no significant postoperative complications. This is the first reported case of spontaneous bilateral ovarian hemorrhage in a black-and-white ruffed lemur, secondary to idiopathic arteriopathy, reported within the veterinary literature.